Daughters car, MOT was last week and it sailed through NO advisories.

Today, the OS led brake light has failed. All the other functions in that cluster are working. Can these brake leds be replaced? if so any one have a p/n or is it a complete new cluster £200+? Just seems odd all leds are out. Its MY13 and has original clusters fitted not an diy upgrade.

Somehow the passenger kicked off/dislodged the fuse box cover in the passenger footwell, is this just coincidence with the led failure? It happened the same morning, so seems suspicious.
Read somewhere that they are controlled by a module, not had chance to investigate further as daughter is out and about, but intend to DTC check maybe a reset will cure this fault.
Anyone had this issue.

Check all the connections at the fuse, as many items are connected there, even if they're not actually fused.

The LED tail lamp assembly isn't repairable unless you have good electronics skills. Hyundai Ioniq 5 Ultimate. The replacement for the SE.
2009 Rimini Red SE TD4. Almost sold.
2006 Tonga Green i6 HSE. Gone.

So finally got access to car and put the AP200 on it.
Reset 2 faults
P1703-00 intermittent "Brake switch out of self test range"
P0504-62 intermittent "Brake switch A/B correlation

All good both cleared, and OS brake light now works.
With out doubt now suspect it happened when the fuse cover was dislodged so checked cables all OK

One of life's mysteries

Great reply and good to know!
Thanks for sharing.
Kind regards,
Redfox.